Moroccan Journal of Chemistry最新文献_第2页

Study of dechlorination by natural adsorbents (chitin and chitosan) 天然吸附剂（甲壳素和壳聚糖）的脱氯研究

IF 1.1

Moroccan Journal of Chemistry Pub Date : 2021-08-07 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I3.21865

El Mostafa Erradi, A. Cherrat, K. Jaafari

引用次数: 1

Synthesis of functionalized alkenes via Knoevenagel condensation using Marine Fish Scales as a new efficient and eco-friendly catalyst 以海洋鱼鳞为新型高效环保催化剂的Knoevenagel缩合法合成功能化烯烃

IF 1.1

Moroccan Journal of Chemistry Pub Date : 2021-08-07 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I3.23058

M. A. Taleb

引用次数: 0

Adsorption of Iron (II) from Textile Industry Effluent uing Luffa Cylindrica 丝瓜纺织废水对铁的吸附（Ⅱ）

IF 1.1

Moroccan Journal of Chemistry Pub Date : 2021-08-07 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I3.21663

K. Nwosu‐Obieogu, G. Dzarma, B. Okolo, K. N. Akatobi

{"title":"Adsorption of Iron (II) from Textile Industry Effluent uing Luffa Cylindrica","authors":"K. Nwosu‐Obieogu, G. Dzarma, B. Okolo, K. N. Akatobi","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I3.21663","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I3.21663","url":null,"abstract":"Abstract This research investigated the efficiency of luffa cylindrica activated carbon as adsorbent material in the removal of iron (II) from the textile industry effluent in a batch adsorption experiment. The adsorption process was studied as a function of contact time, pH of the solution and adsorbent dosage. At room temperature, the batch adsorption experiment showed maximum adsorption of iron (II) at a pH of 6, a contact time of 60 minutes and an adsorbent dosage of 1g/L. The effluent was characterized using the standard method (atomic absorption spectrometry) while the adsorbent was prepared, carbonated and characterized using SEM and FTIR. The SEM findings revealed a highly porous morphology. The FTIR revealed the presence of various functional groups (OH, CH, C=C and C-C). The findings of the batch adsorption experiment were fitted using Langmuir and Freundlich isotherm models and Langmuir model gave a better fit. The kinetic data of iron (II) was evaluated using pseudo-first-order and pseudo-second-order kinetic models. The batch adsorption experimental data conforms more to the pseudo-first-order kinetic model.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42322965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental and theoretical studies on corrosion inhibitory action of Peganum harmala (L.) seeds extract on carbon steel in 1M HCl 骆驼蓬种子提取物在1M盐酸中对碳钢缓蚀作用的实验与理论研究

IF 1.1

Moroccan Journal of Chemistry Pub Date : 2021-08-07 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I3.22928

I. Ghazi, S. Jorio, M. Siniti, R. Fdil, H. Elattari

{"title":"Experimental and theoretical studies on corrosion inhibitory action of Peganum harmala (L.) seeds extract on carbon steel in 1M HCl","authors":"I. Ghazi, S. Jorio, M. Siniti, R. Fdil, H. Elattari","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I3.22928","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I3.22928","url":null,"abstract":"The objective of this study is to test the inhibitory efficiency of the methanol extract of P. harmala against the corrosion of carbon steel C38 in 1M hydrochloric acid by gravimetric method and electrochemical measurements. The results indicated that the methanol extract of P. harmala is a good inhibitor of carbon steel. The inhibition efficiency increases with the increase of the concentration of the inhibitor. The nature of adsorption of the extract on carbon steel surface was in conformity with Langmuir isotherm. Both kinetic and thermodynamic parameter of adsorption allows us to suggest chemical adsorption of this inhibitor on the metal. Potentiodynamic polarization measurements show that P. harmala acts as mixed type inhibitor. The result of EIS was correlating with the result of polarization measurement. A theoretical study was done in solution for major alkaloids isolated from P. harmala seeds, and was investigated using density functional theory (DFT) at the B3LYP/6-31G(d,p) basis set level through the relationship between their molecular and electronic structure. The quantum chemical parameters such as E HOMO (highest occupied molecular orbital energy), E LUMO (lowest unoccupied molecular orbital energy), energy gap (ΔE), dipole moment (μ), absolute hardness (η), absolute softness (S), the absolute electronegativity (χ), the fractions of electrons transferred from the inhibitor molecule to the metallic atom (ΔN) and the electrophilicity index (ω) were calculated. The local selectivity and reactivity has been analyzed through the Fukui function indices in order to compare the possible sites for nucleophilic and electrophilic attacks.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45089825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

STUDY OF THE BEHAVIOR OF AN EPOXY COATING FOOD CONTACT 环氧涂层食品接触性能的研究

IF 1.1

Moroccan Journal of Chemistry Pub Date : 2021-08-07 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I3.22253

Z. Kadri

{"title":"STUDY OF THE BEHAVIOR OF AN EPOXY COATING FOOD CONTACT","authors":"Z. Kadri","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I3.22253","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I3.22253","url":null,"abstract":"Epoxies have been used in the internal coating of cans to endure a long shelf life for canned goods; several types of interactions exist between this kind of packaging (container) and the packed product (contained). This container/contained contact can influence the properties of the packed product, we are interested in this study to contribute to the development of a new formulation in order to prepare an Epoxy coating able to come in contact with foodstuffs, thus our studies based on a selective choice of raw materials that respect the international regulation of food contact, while taking into account the stoichiometric parameters to have a well-cross-linked and resistant polymer. However, the aim of this work is to study the behavior of this developed epoxy coating in contact with different simulant, which represent three categories of food. Within this study, we have characterized the epoxy paint by infra-red, and we have follow the mass variation and the sorption’s kinetics of water, acid acetic, and ethanol in contact with epoxy film by the gravimetric technique, the results allowed us to calculate the diffusion coefficient of each simulant, and then compute the activation energy and thermodynamic parameters. Moreover, the results of the gravimetric method show that the temperature impact the kinetics of diffusion more than the contact time do, the mass transfer depends on the nature of the simulant in contact and on its physic-chemical properties, it concluded also the mass stability of the epoxy coating from 25°C to 40°C.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48174256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Adsorption of a basic dye, Methylene Blue, in aqueous solution on bentonite 膨润土对碱性染料亚甲基蓝水溶液的吸附

IF 1.1

Moroccan Journal of Chemistry Pub Date : 2021-08-07 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I3.23303

Hanane Ait Hmeid

{"title":"Adsorption of a basic dye, Methylene Blue, in aqueous solution on bentonite","authors":"Hanane Ait Hmeid","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I3.23303","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I3.23303","url":null,"abstract":"The dyes are used in many industrial sectors such as textiles, paper and leather dyeing, as well as in the food and cosmetics industry. Dyes are known to be toxic and persistent in the environment and require physico-chemical techniques to degrade them. This work deals with the study of the adsorption of the cationic dye methylene blue on raw bentonite from the region of Nador (Morocco). The physico-chemical properties show that our bentonite indicates a very high alkalinity. The amplitude of swelling shows that this bentonite is very high is sensitive to water. The SEM shows petaloid-shaped aggregates of the grains in spherical form with heterogeneous dimensions. Various experimental parameters were analyzed; initial concentration of the dye, pH, mass of the adsorbent and temperature. Adsorption tests showed that the maximum duration of this cationic dye on bentonite is established after 80 minutes. Experimental results showed that the adsorption of the methylene blue dye on raw bentonite depends on the pH of the solution and the initial concentration of the dye. Although the amount of methylene blue adsorbed decreases with increasing temperature, this indicates that adsorption is an exothermic process. The adsorption capacity was determined using the Langmuir, Freundlich, Elovich and Temkin isotherms. The binding of methylene blue follows Freundlich's law.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48321745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Effect of ammonium citrate concentration variation on the carbon dots colistin modification for Escherichia coli detection 柠檬酸铵浓度变化对碳点粘菌素修饰检测大肠杆菌的影响

IF 1.1

Moroccan Journal of Chemistry Pub Date : 2021-08-07 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I3.23191

S. Suherman, Yoga Nurwijaya, E. Wahyuni, D. Siswanta, K. Morita, Y. Oki

{"title":"Effect of ammonium citrate concentration variation on the carbon dots colistin modification for Escherichia coli detection","authors":"S. Suherman, Yoga Nurwijaya, E. Wahyuni, D. Siswanta, K. Morita, Y. Oki","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I3.23191","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I3.23191","url":null,"abstract":"World Health Organization (WHO) mentioned that diarrhea is one of the main causes of under-five mortality in developing countries due to Escherichia coli ( E. coli ) bacteria. Synthesis of colistin-conjugated-carbon dots using ammonium citrate as a precursor for E. coli detection has been carried out to study its application for detection in water samples from urban population wells. Synthesis of carbon dots (CDs) was carrried out using conventional pyrolisis method. Ammonium citrate with mass variation of 10; 15; 20; and 25 mg were added to 2.5 g colistin and heated at 180 C for 1 h. Brown residue was yielded; more over the functional groups and morphology were characterized by FT-IR and TEM. The brown residue is further diluted by distilled water, centrifuged at 8000 rpm for 10 min. The absorbances were analyzed using spectrophotometer UV-Vis. Carbon dots colistin with different concentration of ammonium citrate variations were analyzed using spectrophotometer fluorescence at 310-450 nm and the highest intensity would be used for E. coli detection. From the experimental part, it was found that CDs colistin has spherical morphology with diameter around 3-10 nm. The highest intensity was achieved at excitation wavelength of 360 nm from CDs colistin with 20 mg ammonium citrate. In the detection process of three household urban wells water in Yogyakarta-Indonesia, it was concluded that one sample was found to contain E. coli whose concentration was higher than the permitted limit of 235 cfu per 100 mL set by Ministry of Health-Republic of Indonesia.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46712458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative study of the mineral composition of carob pulp (Ceratonia siliqua L.) from various regions in Morocco 摩洛哥不同地区角豆果肉（Ceratonia siliqua L.）矿物成分的比较研究

IF 1.1

Moroccan Journal of Chemistry Pub Date : 2021-08-07 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I3.21872

Kaoutar El Oumlouki

{"title":"Comparative study of the mineral composition of carob pulp (Ceratonia siliqua L.) from various regions in Morocco","authors":"Kaoutar El Oumlouki","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I3.21872","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I3.21872","url":null,"abstract":"Ceratonia siliqua L. ou la caroube est une espece agro-forestiere-pastorale avec d'enormes interets socio-economiques et ecologiques. Il a longtemps ete cultive pour l'alimentation humaine et animale. Actuellement, il est de plus en plus utilise par les secteurs alimentaires, pharmaceutiques et dietetiques. C'est une espece typiquement mediterraneenne et elargie distribuee au Maroc. Afin de caracteriser et valoriser la caroube du Maroc, une etude comparative de la composition minerale de la pulpe de caroube de quatre regions du Maroc (Beni-Mellal, Chaoun, Tafraoute et Taounate) pour l’elite de la region pour la region chaque element mineral, les resultats de ces travaux comportent une difference significative pour tous les parametres chimiques et physico-chimiques entre les regions etudiees. La caracterisation a montre une gamme de variation en termes de teneur en eau, + = 1121,1-1300,2 mg / 100g, P = 41,9-57., 2 mg / 100g, Ca 2+ = 270,4- 305,3 mg / 100g, Mg 2+ = 40,4- 144, 8 mg / 100g et Na + = 31,6-81,7 mg / 100g Fe 2+ = 5,26-6,66 mg / 100g, Zn 2+ = 1,80-2,61 mg / 100g, Mn 2+ = 0., 60-0,75 mg / 100g, Cu 2+ = 0,42-0,56 mg / 100g).","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48740220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Combined antimicrobial effect of bacteriocins of LAB isolated from a traditional brine table olives and essential oils against foodborne pathogens 从传统卤水橄榄中分离的乳酸菌素与精油对食源性致病菌的联合抑菌作用

IF 1.1

Moroccan Journal of Chemistry Pub Date : 2021-08-07 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I3.22091

S. Gaamouche

{"title":"Combined antimicrobial effect of bacteriocins of LAB isolated from a traditional brine table olives and essential oils against foodborne pathogens","authors":"S. Gaamouche","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I3.22091","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I3.22091","url":null,"abstract":"The study aimed to determine the antimicrobial activity of bacteriocinogenic lactic acid bacteria isolated from olive brine and three essential oils (Thyme, Rosemary and Oregano Eos) alone and in combination against the Gram-positive L. monocytogenes and the Gram-negative E. coli O157: H7. The antimicrobial activity was determined by evaluation of minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) of the tested antimicrobial agents. The evaluation demonstrates that the two CFSs of lactic strains and the purified bacteriocins inhibit the growth of both L. monocytogenes and E. coli . The results showed that thyme EO is most effective followed by rosemary and Oregano Eos. Thus, all combination executed against L. monocytogenes using the checkerboard technique showed an additive effect unless the CFSs of LAB in combination with Thyme EO which showed no interactive effect. Whereas the combination against E. coli, only two bacteriocins in combination with Thyme EO and ELBC02 bacteriocin in combination with Rosemary EO that showed an additive effect. The results obtained in these studies coupled with the right knowledge opens the way to the combination as a new field of application whose goal is confined to conservation and the safety of food.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42321985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Investigation of the Fluoroperovskite LiBaF3, Examining the Optical, Elastic, Electronic and Structural Properties: DFT Study. 氟钙钛矿LiBaF3的光学、弹性、电子和结构性质的研究:DFT研究。

IF 1.1

Moroccan Journal of Chemistry Pub Date : 2021-08-07 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I3.23461

E. Olawale

引用次数: 0